First satellite of Latvia 'Venta-1' is a project by Ventspils Augstskola (Ventspils University College) and few days ago it was asked on their official page when it would be launched. Their reply suggests orbital parameters for PSLV C36 orbit are not suitable for them and next opportunity for them would likely be in May 2017.

'Venta-1' mated with 'Max Valier' satellite (called MV pack together) was scheduled for launch on PSLV C34 but due risks associated with their unique separation system it was carried over to next suitable launch opportunity which now appears to be with Cartosat-2D. Now lets see if 'Max Valier' is on next launch, its entry didn't show up on import database and the countdown ticker on their websites is dead too. (Edit: Now counting down to 23 Apr 2017)

Upcoming missions include PSLV-C38, planned for launch of earth observation satellite Cartosat-2E by June last week; GSLV Mk II for launch of GSAT-6A satellite in September; and Chandrayaan-III Moon mission in December this year.